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STNI

STNISea-Tac Noise.Info

  • Solve for Sea-Tac. Solve for every airport.
  • Since 2016, working to obtain justice for everyone living under the flight path.
  • Less Noise. Cleaner Air. Better Public Health. Compensation.
  • Everything you think you know about the airport is wrong.

Category : Key Documents(137)

The (137) files, images and basic information we refer to constantly from the Document Library and Resources pages.

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  • 2025-10-28

    Snow Storage Expansion Phase II by Lagoon 3

    ★
    Aerial satellite map of O'Hare International Airport showing two annotated snow storage areas: 'Completed Snow Storage Expansion Phase I' along the south airfield and 'Snow Storage Expansion Phase II by Lagoon 3' on the west side, with green arrows indicating access routes between locations.
    CategoriesKey Documents TagsAirport, Airport Expansion, Airport Layout Plans, Port Of Seattle
  • 2025-10-28

    Port of Seattle Regular Commission Meeting

    ★
    The Port of Seattle held a Regular Commission Meeting on October 28, 2025, covering routine business such as approval of meeting minutes, claims totaling over $156 million, and several construction and lease authorizations related to Seattle-Tacoma International Airport facilities. Agenda items included contracts for snow storage expansion, a building renovation at Sea-Tac, and a cruise terminal lease agreement. The commission also considered a resolution reaffirming the Port's Welcoming Port Policy in support of immigrants, refugees, and international visitors.
    CategoriesKey Documents, Meetings TagsAirport, Airport Committees, Airport Development Fund, Airport Expansion, Port Of Seattle
  • 2025-10-22

    Programmatic Environmental Checklist – Seattle-Tacoma International Airport Flight Corridor Management Program

    ★
    Environmental checklist for SEA’s Flight Corridor Management Program, which identifies and removes tree obstructions from airport flight corridors every five years to comply with FAA regulations. The document outlines the program’s background, implementation cycles, and environmental review process.
    CategoriesKey Documents TagsAirport, Airport Expansion, FAA, Port Of Seattle, SEPA
  • 2025-10-22

    Programmatic Environmental Checklist – Seattle-Tacoma International Airport (SEA) Flight Corridor Management Program

    ★
    SEPA Flight Corridor Mgmt Program Checklist November 6, 2025 REV Signed 1 Pdf
    Environmental checklist for the Port of Seattle’s Flight Corridor Management Program at SEA, which involves regular identification and removal of tree obstructions to maintain compliance with FAA flight corridor regulations. The program operates on approximately five-year implementation cycles.
    CategoriesKey Documents TagsAir Traffic Control, Airport, Airport Improvement Program, Airport Layout Plans, Airspace Study, Port Of Seattle
  • 2025-10-03

    UFP-Advisory-Group-Meeting-2025.10

    ★
    Advisory group meeting presentation focused on urban ultrafine particles, likely related to aviation emissions and air quality impacts on airport communities. The meeting appears to be part of ongoing research or policy discussions regarding particulate matter from aircraft operations.
    CategoriesKey Documents, Meetings, Regular Events TagsAir Purifiers, Air Quality Monitors, Airport Communities Coalition, Atmospheric Science, Aviation Emissions
  • 2025-09-12

    Legal Services Agreement Regarding Issues Regarding Port of Seattle’s Sustainable Airport Master Plan (SAMP)

    ★
    In September 2025, the City of SeaTac, Washington engaged the law firm Leech Tishman Nelson Hardiman to provide legal counsel regarding the Port of Seattle's Sustainable Airport Master Plan (SAMP), specifically in response to an anticipated Federal Aviation Administration (FAA) Finding of No Significant Impact (FONSI) and Record of Decision (ROD). The firm's work includes preparing legal analysis, submitting comments, and filing a Petition for Review in either the Ninth Circuit or D.C. Circuit Court of Appeals challenging the FAA's environmental findings once published in late 2025. The engagement is capped at $300,000 with an initial $10,000 retainer, and billing rates range from $300–$400 per hour for associates to $540 per hour for lead attorney Steven M. Taber.
    CategoriesKey Documents, Litigation TagsAirport, Airport Law, SAMP, seatac
  • 2025-08-12

    Passenger Growth – Port of Seattle Commission Regular Meeting P69

    ★
    A Microsoft Teams screen capture from the Port of Seattle Commission Regular Meeting (P69), timestamped 1:09 PM on 8/12/2025, showing a 'Passenger Growth' presentation slide. The slide displays actual passenger totals from 2021–2024 (ranging from 36.2M to 52.6M) alongside a 2025 budget of 53.5M and a 2025 forecast of 53.1M, noting 0.9% forecast growth versus 2024 actual and a -0.7% variance below budget. The speaker identified in the taskbar is Payne, Aubree.
    CategoriesKey Documents, Meetings TagsAirport, Airport Committees, Port Of Seattle
  • 2025-08-12

    Airport Development Fund Balance

    ★
    A Microsoft Teams screen share from the Port of Seattle Commission Regular Meeting (P69) shows a slide titled 'Airport Development Fund Balance,' displaying a bar chart with a beginning balance of $739,774 thousand, an ending balance forecast of $830,000 thousand, and a budget of $829,833 thousand, with a bullet noting the $830M ending balance equals 18 months of O&M in 2025. The presenter identified in the lower caption bar is Payne, Aubree, and the meeting timestamp reads 3:00:05 with a system clock of 1:14 PM on 8/12/2025.
    CategoriesKey Documents TagsAirport, Airport Committees, Airport Development Fund, Port Of Seattle
  • 2025-05-20

    Transportation Budget – Engrossed Substitute Senate Bill 5161

    ★
    Washington State's 2025-2027 Transportation Budget (Engrossed Substitute Senate Bill 5161) was signed into law on May 20, 2025, authorizing appropriations from various state accounts for transportation-related expenses, capital projects, and employee compensation through June 30, 2027. The bill was passed by the Senate and House on April 27, 2025, with Governor Bob Ferguson approving the measure while vetoing several specific sections. Note: This document covers broad statewide transportation fiscal matters and does not contain provisions specifically addressing Sea-Tac Airport noise policy.
    CategoriesKey Documents, Legislation TagsCommercial Aviation Work Group, Commercial Aviation Workgroup, SB5161, state legislature
  • 2025-02-11

    Port of Seattle Regular Commission Meeting – February 11, 2025

    ★
    The Port of Seattle Commission held a Regular Commission Meeting on February 11, 2025, during which a Proclamation was issued commemorating the Day of Remembrance (February 19th) and honoring Japanese Americans affected by Executive Order 9066, which authorized the forced incarceration of over 120,000 people of Japanese descent during World War II. The proclamation acknowledges Washington State's unique connection to this history, condemns acts of vandalism and discrimination, and reaffirms the Commission's commitment to equity, civil liberties, and justice for all.
    CategoriesHistory, Key Documents, Meetings TagsAirport Committees, Port Of Seattle

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Issues

Sea-Tac Airport is currently undergoing the largest and longest expansion in its history, collectively known as the Sustainable Airport Master Plan (SAMP). Some of it you can already hear, but you’re probably not aware of what it all means. Here’s what you need to know.
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Read This!

As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.
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Subscribe to the only podcast devoted to policies, politics, history, impacts for people living under the flight path everywhere. It’s definitely not just about noise!

The Podcast!

Subscribe to the only podcast devoted to helping people under the flight path everywhere. It’s definitely not just about noise!

Most Recent: Ep #38 Aviation Forum Postgame (Raw!)

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